:root {
  --bt-page-bg: #fbfcff;
  --bt-surface: #ffffff;
  --bt-ink: #0f172a;
  --bt-ink-soft: #1e293b;
  --bt-ink-dim: #64748b;
  --bt-accent: #2563eb;
  --bt-accent-strong: #4f46e5;
  --bt-green: #047857;
  --bt-amber: #b45309;
  --bt-purple: #7c3aed;
  --bt-cloud-blue: rgba(37, 99, 235, 0.075);
  --bt-cloud-purple: rgba(124, 58, 237, 0.06);
  --bt-grid-line: rgba(15, 23, 42, 0.04);
  --bt-border: rgba(15, 23, 42, 0.1);
  --bt-shadow: rgba(15, 23, 42, 0.06);

  --color-background: var(--bt-page-bg);
  --color-foreground: var(--bt-ink);
  --color-primary: var(--bt-accent);
  --color-accent: var(--bt-purple);
  --color-border: var(--bt-border);
  --color-muted: var(--bt-ink-dim);
  --color-subtle-background: rgba(255, 255, 255, 0.64);
}

body {
  min-height: 100vh;
  background:
    radial-gradient(circle at 28% 12%, var(--bt-cloud-blue), transparent 34rem),
    radial-gradient(circle at 62% 6%, var(--bt-cloud-purple), transparent 36rem),
    linear-gradient(var(--bt-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--bt-grid-line) 1px, transparent 1px),
    var(--bt-page-bg);
  background-size: auto, auto, 44px 44px, 44px 44px, auto;
  color: var(--bt-ink);
  font-family: var(--font-family-body);
}

.bt-site-wrap {
  width: min(1160px, 100%);
  margin: 0 auto;
  padding: 28px clamp(20px, 4vw, 44px) 96px;
  display: grid;
  gap: 76px;
}

.bt-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  border-bottom: 1px solid var(--bt-border);
  padding-bottom: 18px;
}

.bt-brand {
  color: var(--bt-ink);
  font-size: 1rem;
  font-weight: 700;
  text-decoration: none;
}

.bt-nav {
  display: flex;
  gap: 26px;
  color: var(--bt-ink-dim);
  font-size: 0.94rem;
}

.bt-nav a {
  text-decoration: none;
}

.bt-nav a[aria-current="page"] {
  color: var(--bt-ink);
  font-weight: 700;
}

.bt-hero {
  position: relative;
  max-width: 820px;
  padding: 108px 0 68px;
}

.bt-hero::before {
  position: absolute;
  inset: -80px -16vw auto;
  z-index: -1;
  height: 480px;
  border-radius: 999px;
  background:
    radial-gradient(circle at 42% 52%, var(--bt-cloud-blue), transparent 66%),
    radial-gradient(circle at 62% 34%, var(--bt-cloud-purple), transparent 64%);
  content: "";
  filter: blur(18px);
}

.bt-kicker {
  color: var(--bt-accent);
  font-size: 0.86rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0;
}

.bt-hero h1 {
  max-width: 12ch;
  margin-top: 22px;
  font-size: 5rem;
  line-height: 0.95;
  letter-spacing: 0;
}

.bt-page-hero h1 {
  max-width: 13ch;
  font-size: 4.75rem;
}

.bt-hero h1,
.bt-band h2,
.bt-section-heading h2 {
  color: var(--bt-ink);
}

.bt-tagline {
  max-width: 720px;
  margin-top: 24px;
  color: var(--bt-ink-soft);
  font-size: 1.55rem;
  line-height: 1.32;
  font-weight: 650;
}

.bt-intro {
  color: var(--bt-ink-dim);
  margin-top: 28px;
  max-width: 650px;
  font-size: 1.15rem;
  line-height: 1.65;
}

.bt-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 8px;
  text-decoration: none;
  border: 1px solid var(--bt-border);
  font-size: 0.95rem;
  font-weight: 700;
}

.bt-btn-solid {
  background: linear-gradient(135deg, var(--bt-accent), var(--bt-accent-strong));
  color: #fff;
  border-color: var(--bt-accent);
}

.bt-btn-ghost {
  color: var(--bt-ink);
  background: var(--bt-surface);
}

.bt-actions {
  margin-top: 30px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.bt-feature-panel {
  display: grid;
  gap: 28px;
}

.bt-section-heading {
  max-width: 760px;
}

.bt-section-heading h2 {
  margin-top: 12px;
  font-size: 2.75rem;
  line-height: 1.04;
}

.bt-feature-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 16px;
}

.bt-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.bt-card,
.bt-feature-card {
  border: 1px solid var(--bt-border);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.82);
  padding: 26px;
  box-shadow: 0 18px 48px var(--bt-shadow);
  backdrop-filter: blur(10px);
}

.bt-feature-card {
  grid-column: span 2;
  min-height: 280px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 24px;
}

.bt-feature-card-wide {
  grid-column: span 3;
}

.bt-feature-card-dark {
  background: #101827;
  color: #fff;
}

.bt-feature-card-dark p:last-of-type {
  color: rgba(255, 255, 255, 0.72);
}

.bt-feature-number {
  color: var(--bt-accent);
  font-size: 0.76rem;
  font-weight: 800;
  text-transform: uppercase;
}

.bt-feature-card-dark .bt-feature-number {
  color: #93c5fd;
}

.bt-feature-card-dark code {
  width: fit-content;
  max-width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  padding: 6px 8px;
  font-size: 0.86rem;
  overflow-wrap: anywhere;
}

.bt-card-title {
  font-weight: 700;
  margin-bottom: 10px;
}

.bt-card p:last-child,
.bt-feature-card p:last-of-type,
.bt-band p {
  color: var(--bt-ink-dim);
  line-height: 1.65;
}

.bt-chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
}

.bt-chip-list li {
  border: 1px solid var(--bt-border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--bt-ink-soft);
  padding: 7px 10px;
  font-size: 0.82rem;
  font-weight: 700;
}

.bt-mini-ledger {
  display: grid;
  gap: 8px;
}

.bt-mini-ledger span {
  border-left: 3px solid var(--bt-green);
  border-radius: 6px;
  background: rgba(4, 120, 87, 0.08);
  color: var(--bt-ink-soft);
  padding: 9px 10px;
  font-size: 0.9rem;
  font-weight: 700;
}

.bt-vat-grid {
  display: grid;
  grid-template-columns: repeat(3, 38px);
  gap: 8px;
}

.bt-vat-grid span {
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  border-radius: 6px;
  background: rgba(180, 83, 9, 0.11);
  color: var(--bt-amber);
  font-weight: 800;
}

.bt-audience-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.bt-value-band,
.bt-stat-band,
.bt-trust-row,
.bt-cta-band {
  border: 1px solid var(--bt-border);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 18px 48px var(--bt-shadow);
}

.bt-value-band {
  padding: clamp(28px, 5vw, 56px);
}

.bt-value-band p {
  max-width: 940px;
  color: var(--bt-ink);
  font-size: 2.35rem;
  line-height: 1.12;
  font-weight: 800;
}

.bt-stat-band {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.bt-stat-band div {
  min-height: 150px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-right: 1px solid var(--bt-border);
}

.bt-stat-band div:last-child {
  border-right: 0;
}

.bt-stat-band strong {
  color: var(--bt-ink);
  font-size: 2rem;
  line-height: 1;
}

.bt-stat-band span,
.bt-trust-row span {
  color: var(--bt-ink-dim);
  font-size: 0.92rem;
  font-weight: 700;
}

.bt-trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 18px;
}

.bt-trust-row span {
  border: 1px solid var(--bt-border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.74);
  padding: 9px 12px;
}

.bt-cta-band {
  padding: clamp(24px, 4vw, 40px);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}

.bt-cta-band > p:first-child {
  max-width: 560px;
  color: var(--bt-ink);
  font-size: 1.55rem;
  line-height: 1.22;
  font-weight: 800;
}

.bt-cta-band .bt-actions {
  margin-top: 0;
}

.bt-overview-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.bt-text-link {
  display: inline-flex;
  margin-top: 16px;
  color: var(--bt-accent);
  font-weight: 700;
  text-decoration: none;
}

.bt-text-link::after {
  content: "->";
  margin-left: 7px;
}

.bt-band code {
  border: 1px solid var(--bt-border);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--bt-ink-soft);
  padding: 2px 5px;
  font-size: 0.92em;
}

.bt-band {
  border-top: 1px solid var(--bt-border);
  padding-top: 56px;
  max-width: 60rem;
}

.bt-band h2 {
  margin-bottom: 14px;
  font-size: 2.25rem;
  line-height: 1.08;
}

@media (max-width: 960px) {
  .bt-feature-grid,
  .bt-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .bt-feature-card,
  .bt-feature-card-wide {
    grid-column: span 1;
  }

  .bt-stat-band {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .bt-stat-band div:nth-child(2) {
    border-right: 0;
  }

  .bt-stat-band div:nth-child(-n + 2) {
    border-bottom: 1px solid var(--bt-border);
  }

  .bt-cta-band {
    align-items: flex-start;
    flex-direction: column;
  }

  .bt-topbar {
    flex-wrap: wrap;
  }

  .bt-hero h1,
  .bt-page-hero h1 {
    font-size: 3.75rem;
  }

  .bt-section-heading h2 {
    font-size: 2.25rem;
  }
}

@media (max-width: 560px) {
  .bt-site-wrap {
    gap: 52px;
    padding-top: 22px;
    padding-bottom: 64px;
  }

  .bt-nav {
    width: 100%;
    flex-wrap: wrap;
    gap: 14px 18px;
  }

  .bt-feature-grid,
  .bt-audience-grid,
  .bt-grid {
    grid-template-columns: 1fr;
  }

  .bt-hero h1,
  .bt-page-hero h1 {
    font-size: 3rem;
  }

  .bt-tagline {
    font-size: 1.28rem;
  }

  .bt-section-heading h2 {
    font-size: 2rem;
  }

  .bt-value-band p {
    font-size: 1.8rem;
  }

  .bt-stat-band {
    grid-template-columns: 1fr;
  }

  .bt-stat-band div,
  .bt-stat-band div:nth-child(2) {
    border-right: 0;
  }

  .bt-stat-band div:nth-child(-n + 3) {
    border-bottom: 1px solid var(--bt-border);
  }

  .bt-hero {
    padding: 70px 0 44px;
  }

  .bt-actions {
    flex-direction: column;
  }

  .bt-btn {
    width: 100%;
  }
}